Herein, magnetic porous organic polymers composites (MOPs) with abundant free phenolic hydroxyl group were synthesized via a simple and green azo coupling reaction under mild conditions in water. Remarkably, Fe 3 O 4 @SiO 2 nanoparticles were encapsulated in the disordering porous organic polymers during the coupling reaction. The prepared MOPs possessed excellent stability, high special surface areas, controllable magnetism, and high adsorption capacity (1153 mg g –1 ) toward cationic dye methylene blue. Moreover, the MOPs could be easily and rapidly recovered from the solution by using a magnet due to their superparamagnetic property and could be reused at least 5 times without decreasing the adsorption capacity, demonstrating a potential application in pollutants removal.
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Huang et al. (2017) studied this question.
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